<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container{
            
            
            display: flex;
           flex-wrap: wrap;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="left"><h3>左边</h3></div>
        <div class="right" style="margin-left: 200px;"><h3>右边</h3></div>
    </div>
</body>
</html>